Reducing valve



ay i9, 1931.

H. J. MASTENBROOK REDUCING VALVE Filed Oct. 15, 1928 C m m ,Ci

a5` To DRAIN 4| s lPatented Mayie, 19:'.1l 1,3q5702 UNITED STAT-Es PATENT'OFFICE.

HENRY J'. MASTENBROOK, Ol' HEIGHTS, OHIO, ASSIIGN'OB TO THE S'W'ABT- WOUT Ol' CLEVELAND, OHIO, A. OOBPOBATION 0F OHIO nnnucme vnnv'n Application led 'Octobery 15, 1928. Serial No. 312,550.

This invention relates to reducing valvesv tion of the closure member restricts the ilow and more particularly to a device-for mainthrough the valve. Extending upwardly taining with great accuracy and Within very from the closure member is a valve stem 6 narrow limits the Huid pressure at a given which at'its upper end, see Fig. 2, carries a 5 point in auid stream. mushroom like member 7 which is engaged 55 It is among the objects of my invention to by a diaphragm 8. Associated with the provide a reducing valve which will mainmushroom like member and with the valve tain within very accurate-limits the pressure stem and with the supporting structure of ofthe iiuid iowin from the valve. Another the valve is a splined guide 9 holding the 10 object is to provige a reducing valve wherevalve stem against rotation during its lori- 00.

in the pressure of the fluid flowing from the gitudinal travel. Associated with the valve valve isintegrated and multiplied Ain its eiect stem and acting between the stem'and the upon the reducing valve. Another object is frame of the valve is a sprin 10 which tends to provide` a control for .a reducing valve to open the valve. lThe .strain'in th'e sprin wherein very small changes in pressure in may. be adjusted through anut 11. threade outflowing iluid will have the eiect of causingA on the valve stem. A second nut 12 is threadsubstantially great changes in the pressure ed on the valve stem and may be adjustably j exerted upon the reducing valve actuating positioned to engage the frame of the valve parts. Another Objectis to arrange such a see Fi .2, to limit the longitudinal travel-of 2 valve along with its controlling parts as a the va ve stem.. 70 complete -and integral unit, the installation Carried by suitable structure and ar of which may be a simple matter. Another ranged'in the head13 of the valve is a diap object istoprovide a complete reducing valve phragm chamber 14. -Connecting the diameans for adjustin ittoan extreme sensitivephragm chamber with-the low ressure side complete integxral reducin valve and control practice and construction of a reducing valve, therefor whic 4may be a justed after its inthe reduced 'or low pressurein the line 2 is stallation to develop reduced pressures withestablished in the diaphragm chamber so that in a wide range of selection. as this pressure increases the,low throu h 39 Other objects'will appear from the follow the valve is throttled. As thepressure e- 3 ing description of a preferred form oi my creases the ow through the valve is inanying drawings.- The essential characteris vand has been ap reciated that with sucha lstics are summarizedin the claim. direct connection, t e reduced pressure varies In the drawings, Fig. 1 is a layout of my considerably because substantial changes in valve and connections disposed in a fluid pressure are needed to'move the valve cloline or pi e; and Fig. 2 is an enlarg' Vvcrosssure member. My invention, as I am about section ta en through the head of the valve to describe it, includes means incorporated 4 and auxiliary valves. in the structure of the valve which will take o Referring' particularly to Fig. 1, I have account of very small changes in thereillustrated a fluid line comprising a part 1 duced pressure to effect major changes in' leading to the reducing valve 4 and a part 2 the pressure established in the diaphragm leading from the valve. For the sake ofilchamber so that the reduced pressure'may lustrat1on, we ma consider that water is be maintained at a substantially constant Y ,45 brought'through t e pipe at high pressure amount within very accurate limits.

landis intended to be discharged throigh 'the l Referring particularly to Fig. 2, I show the valve 4 at a constant low pressure. ithin conduct 15 terminating in the head of the the bod 3 of the valve 4 is preferably a balvalve as at 16 and connecting with apass eanced c osure member 5 arranged with relaway l17 into the diaphragm chamber. e

. tion tothe valve seats so that o wnward moilow through the passageway 17 is controlled 10 25 ness. A still furt er object is to provide av of the valve, is a conduit 15. the usual 75 i invention reference being had to the accomcreased by increasing the valve opemng. t I l by a small valve G having a closure member 18 carried by a'stem 19. A sprin 20 associated with the stem tends to raise t e stem and close the valve. The valve stem may be urged downwardly, moving the valve to open osition, by a diaphgram enclosing a chamr 21. An adjusting nut 22 is arranged to vary the compression in the spring 20 so that various desired pressures need be establishedl in the chamber 21 to actuate the valve G.

Leading from thediaphragm chamber 14 is a Ipassageway controlled by a small valve C having a closure member 31 which closes the passageway 30 when it is moved t downwardly. Movement of the valve member 31 may be controlled through a stem 30 b acted upon at its upper end by a diaphra enclosing a chamber 33 and urged upwar l by a (sipring 32 in which the strain may be a juste by a nut 35. Both of the valves C and l G in the head of the main valve 4 may be of similar construction butof diametrically op- 7 valves'C and G may be of 1/1 osite effects in that downward movement of' oth valve closure members opens the pas- Vwhich exert equal forces to open the valve l G and `vclose the valve C. Thus the flow through the chamber 14 or the relative 'deee of inlet to outlet opening builds or reuces the ressure therein. As illustrated the valves and G are relatively small compared'to the main valve 4. For example, the inch capacity or less and the valve 4 may be of 4 inch capacity or greater. The .small valves C and G are thus far more highly sensitive to small changes 1n pressure and respond to changes measured in ounces which assageways 17 and 31 cause great changes' iii pressure in the chamber 14. Thus in a given instance a'small simultaneous m`ove- `ment of the valves C and G may double the peiling through opening through the valve `C so that the pressure in the chamber 14 is-tended to be increased four-fold.

one or the other of the valves It will be appreciated that, except when C 0r G 1s closed, small flow offluid through and while I' have illustrated a arrangement, it should be men- .that'the conduit 15 need connected to. the low presmay lead to any source of there will be a the conduit 15` preferred tioned in passing, not necessarily be sure line 2 but uid pressure suitable for actuating the by lcontrol of the C the valve G and halve'the b and 32 o r main valve 4. It is preferable that the line 15 transmit a substantial constant head to the (point -16 although the constancy of thisl hea has little effect on the results accomplished b valve an With my invention, but does relieve the control ofconsiderable wear. the connections as shown, a very small drop in pressure in the line 2 causes a similar drop in pressure in the diaphragm4 `a considerable loss in pressure in the cham- 10 to raise er 14 permittingY the -sprin' the closure member 5 furtherV of the valve 4 and increasing the the valve, thus increasing the the line 2. desired amount in the line 2, causes the auxom the seats flow through pressure in An increase in pressure above the 4 iliary valves to move simultaneously in opposite directions causing a proportionately great increase in pressure in the diaphragm chamber 14, which tendsl to throttle the valve 4 and reduce the pressure.

In adjusting the device for operation, the strain on the sprin nut 11 to be a com ortable'working amount less than the desired the effective area of the diaphragm 8 so that when the valve C is tight shut and the valve G 10 is xed through the reduced pressure times wide open and the pressure in the chamber 14 is substantially "equal to the pressure in the ine 2,-the closure member 5 will be firmly seated. With this p/imary adjustment, the

compression in the springs 2O and 32 is adjusted vthrough the nuts 22 and 35 so that when the reduced the chambers 21 and 33 that the valve closure members 18 .and `31 will" float about midway from their seats. When the valve is put into operation and before any pressure is established in the line 2, the valve 4 is wide open with the closure member 5 removed from `its seat, the valve G is tight Ishut and\the valve is wide open providin a discharge ope but no intake opening or the chamber 14.

pressure builds up in the line 2, pressure is established in the chambers 21 and 33 until the valve; 18 begins to open and the valve 81 egins to close, thus creating first 'a small pressure in the chamber 14 tendin thevalve 4IA -When the valve is y in operpressure is established in` to pinch ation the` desired reduced lpressure is established by adjusting the lstrain in the springs 10, 20 and 32. Thus iyf'the reduced pressure is 200 pounds and it is desired to be established at 175 pounds, the compressionv inthe 11 until the re uced amount. v A similar relieving be relieved through the nut l' pressure fallstothe lesser be efected by pressure is maintained in the chamber 14 tending to pinch the valve 4 and lower the reduced pressure. Conversely through opposite adjustment the reduced pressurev can be I increased within a wide range.

While the foregoin has been a description of a preferred form o my invention I do not care to be particularly limited to the particular embodiment shown and described or in w any manner other than by the claim appended hereto. f

l claim ln combination,` a pipe, a Huid actuable valve in said pi e having a pressure chamber m3 for actuating uid and a part enclosing one side of said chamber for moving said valve, means exerting a force tending to move said valve in opposition to the force exerted upon said part, means for adjusting and varying 530 said vlast named means, fluid conducting means extending from said pipe to said pressure chamber and uid conducting. means leading from said pressure chamber to a point of lower pressure than the pressure in said Q5 pipe, and means :for controlling the inflow.

to said pressure vchamber and outflow therefrom comprising independently operable and adjustable valves, one controlling the inlow and the other controlling the outflow to and v3@ Jfrom said chamber, each of said valves havling an independentl operating pressure chamber anda part or moving said valve enclosing one side of each of said chambers,

said chambers having liuid communication @e With each other and with said pipefone of said valves lbeing movable toward open position Whilst the other is moved toward closed position in response to changes in pressure 1n said pipe.

uw lin testimony whereof, l hereunto atlix my signature. f HENRY J. MASTENBROK. 

